Karcher Replacement Quick Connect Adapter Kit for Electric & Gas Power Pressure Washers The Karcher Promise: Cleaner. Quicker. Best-in-class cleaning performance. Compatible with Karcher electric and gas pressure washers. Replaces garden hose quick connect adapters on Karcher electric pressure washers. Can also be used to convert threaded connectors on Krcher gas pressure washers to quick connect. The yellow piece attaches to your garden hose, the black piece to the water inlet on your pressure washer. Contains three pieces: garden hose quick connect adapter, electric pressure washer water inlet adapter and gas pressure washer water inlet adapter.